Even though Detective Chin Ho Kelly (Kam Fong) gets killed in this episode, Kam Fong reprised the role in a 1997 TV Movie "Hawaii Five-O" that completely ignores the death.
Chin Ho is the only character whose subsequent absence from the series is explained on-screen. All of the other characters who were featured during the opening credits but stopped being part of the ensemble (including Kono, Danny Williams, and Ben Kokua) simply vanished from the show without explanation.
Chin Ho Kelly dies early in this story, but his involvement in the show was minimised all season. In a number of episodes, he only appears in one or two scenes, frequently without dialogue (he has no lines at all in A Stranger in His Grave (1978), which aired the week before this one).
During Suzy Kelly's initial conversation with Steve McGarrett, it's mentioned in passing that her mother has died unexpectedly in the years since Cry, Lie (1970). There is no update regarding her sister Alia (seen in Engaged to Be Buried (1973)) ) or her other siblings.